Quest Diagnostics Incorporated
DE ˙ DB ˙ US74834L1008
166,15 € ↑0,65 (0,39%)
2026-06-04
CENA AKCJI
SecurityDE:QDI / Quest Diagnostics Incorporated
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership681,158 shares
Latest Disclosed Value $ 118,201,348
Alliancebernstein L.p. reports 7.71% increase in ownership of QDI / Quest Diagnostics Incorporated

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 681,158 shares of Quest Diagnostics Incorporated (DE:QDI) valued at $116,886,713 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 632,407 shares of Quest Diagnostics Incorporated. This represents a change in shares of 7.71% during the quarter. The current value of the position is $113,174,402 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F QUEST DIAGNOSTICS COM 74834L100 681,158 48,751 7.71 118,201 7.71 0.0383
2026-02-17 2025-12-31 13F QUEST DIAGNOSTICS COM 74834L100 632,407 -2,366 -0.37 109,742 -9.29 0.0347
2025-11-14 2025-09-30 13F QUEST DIAGNOSTICS COM 74834L100 634,773 -607,082 -48.89 120,975 -45.77 0.0381
2025-08-14 2025-06-30 13F QUEST DIAGNOSTICS COM 74834L100 1,241,855 64,283 5.46 223,074 11.96 0.0728
2025-05-15 2025-03-31 13F QUEST DIAGNOSTICS COM 74834L100 1,177,572 84,530 7.73 199,245 20.83 0.0721
2025-02-12 2024-12-31 13F QUEST DIAGNOSTICS COM 74834L100 1,093,042 497,995 83.69 164,896 78.50 0.0560
2024-11-14 2024-09-30 13F QUEST DIAGNOSTICS COM 74834L100 595,047 115,449 24.07 92,381 40.72 0.0310
2024-08-14 2024-06-30 13F QUEST DIAGNOSTICS COM 74834L100 479,598 20,724 4.52 65,647 7.48 0.0229
2024-05-14 2024-03-31 13F QUEST DIAGNOSTICS COM 74834L100 458,874 -176,899 -27.82 61,081 -30.32 0.0216
2024-02-14 2023-12-31 13F QUEST DIAGNOSTICS COM 74834L100 635,773 -214,000 -25.18 87,660 -15.35 0.0337
2023-11-14 2023-09-30 13F QUEST DIAGNOSTICS COM 74834L100 849,773 58,593 7.41 103,553 -6.88 0.0440
2023-08-15 2023-06-30 13F QUEST DIAGNOSTICS COM 74834L100 791,180 75,520 10.55 111,208 9.83 0.0454
2023-05-15 2023-03-31 13F QUEST DIAGNOSTICS COM 74834L100 715,660 -9,826 -1.35 101,252 -10.79 0.0434
2023-02-15 2022-12-31 13F QUEST DIAGNOSTICS COM 74834L100 725,486 99,300 15.86 113,495 47.73 0.0511
2022-11-15 2022-09-30 13F QUEST DIAGNOSTICS COM 74834L100 626,186 -41,928 -6.28 76,827 -13.53 0.0372
2022-08-15 2022-06-30 13F QUEST DIAGNOSTICS COM 74834L100 668,114 78,172 13.25 88,846 10.04 0.0406
2022-05-13 2022-03-31 13F QUEST DIAGNOSTICS COM 74834L100 589,942 2,611 0.44 80,739 -20.54 0.0312
2022-02-14 2021-12-31 13F QUEST DIAGNOSTICS COM 74834L100 587,331 -401,537 -40.61 101,614 -29.28 0.0359
2021-11-10 2021-09-30 13F QUEST DIAGNOSTICS COM 74834L100 988,868 -57,915 -5.53 143,692 4.02 0.0567
2021-07-30 2021-06-30 13F QUEST DIAGNOSTICS COM 74834L100 1,046,783 62,321 6.33 138,144 9.34 0.0555
2021-05-06 2021-03-31 13F QUEST DIAGNOSTICS COM 74834L100 984,462 -169,281 -14.67 126,346 -8.11 0.0554
2021-02-08 2020-12-31 13F QUEST DIAGNOSTICS COM 74834L100 1,153,743 98,272 9.31 137,492 13.78 0.0649
2020-11-12 2020-09-30 13F QUEST DIAGNOSTICS COM 74834L100 1,055,471 146,268 16.09 120,841 16.63 0.0650
2020-08-13 2020-06-30 13F QUEST DIAGNOSTICS COM 74834L100 909,203 -440,556 -32.64 103,613 -4.40 0.0609
2020-05-14 2020-03-31 13F QUEST DIAGNOSTICS COM 74834L100 1,349,759 94,193 7.50 108,386 -19.16 0.0777
2020-02-18 2019-12-31 13F QUEST DIAGNOSTICS COM 74834L100 1,255,566 376,237 42.79 134,082 42.47 0.0762
2019-11-14 2019-09-30 13F QUEST DIAGNOSTICS COM 74834L100 879,329 396,741 82.21 94,115 91.56 0.0586
2019-08-14 2019-06-30 13F QUEST DIAGNOSTICS COM 74834L100 482,588 2,454 0.51 49,132 13.80 0.0305
2019-05-14 2019-03-31 13F QUEST DIAGNOSTICS COM 74834L100 480,134 -67,957 -12.40 43,174 -5.40 0.0281
2019-02-13 2018-12-31 13F QUEST DIAGNOSTICS COM 74834L100 548,091 44,772 8.90 45,640 -15.97 0.0339
2018-11-08 2018-09-30 13F QUEST DIAGNOSTICS COM 74834L100 503,319 1,403 0.28 54,313 -1.57 0.0355
2018-08-13 2018-06-30 13F QUEST DIAGNOSTICS COM 74834L100 501,916 -1,380,114 -73.33 55,181 -70.77 0.0384
2018-05-14 2018-03-31 13F QUEST DIAGNOSTICS COM 74834L100 1,882,030 65,045 3.58 188,768 5.48 0.1365
2018-02-13 2017-12-31 13F QUEST DIAGNOSTICS COM 74834L100 1,816,985 280,401 18.25 178,955 24.37 0.1280
2017-11-13 2017-09-30 13F QUEST DIAGNOSTICS COM 74834L100 1,536,584 392,080 34.26 143,886 13.10 0.1078
2017-08-10 2017-06-30 13F QUEST DIAGNOSTICS COM 74834L100 1,144,504 494,535 76.09 127,223 99.35 0.0984
2017-05-11 2017-03-31 13F QUEST DIAGNOSTICS COM 74834L100 649,969 150,185 30.05 63,820 38.95 0.0508
2017-02-13 2016-12-31 13F QUEST DIAGNOSTICS COM 74834L100 499,784 8,199 1.67 45,930 10.40 0.0383
2016-11-10 2016-09-30 13F QUEST DIAGNOSTICS COM 74834L100 491,585 660 0.13 41,603 4.10 0.0351
2016-08-11 2016-06-30 13F QUEST DIAGNOSTICS COM 74834L100 490,925 -87,287 -15.10 39,966 -3.26 0.0344
2016-05-13 2016-03-31 13F QUEST DIAGNOSTICS COM 74834L100 578,212 7,582 1.33 41,313 1.77 0.0351
2016-02-16 2015-12-31 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 570,630 -23,377 -3.94 40,595 11.18 0.0345
2016-02-12 2015-12-31 13F QUEST DIAGNOSTICS COM 74834L100 570,630 35,077
2015-11-13 2015-09-30 13F QUEST DIAGNOSTICS COM 74834L100 594,007 29,078 5.15 36,514 -10.87 0.0313
2015-08-14 2015-06-30 13F QUEST DIAGNOSTICS COM 74834L100 564,929 41,744 7.98 40,969 1.90 0.0338
2015-05-13 2015-03-31 13F QUEST DIAGNOSTICS COM 74834L100 523,185 205,710 64.80 40,207 88.85 0.0326
2015-02-13 2014-12-31 13F QUEST DIAGNOSTICS COM 74834L100 317,475 30,777 10.73 21,290 22.38 0.0177
2014-11-13 2014-09-30 13F QUEST DIAGNOSTICS COM 74834L100 286,698 877 0.31 17,397 3.71 0.0147
2014-08-13 2014-06-30 13F QUEST DIAGNOSTICS COM 74834L100 285,821 6,143 2.20 16,775 3.56 0.0141
2014-05-13 2014-03-31 13F QUEST DIAGNOSTICS COM 74834L100 279,678 -13,737 -4.68 16,199 3.12 0.0140
2014-02-13 2013-12-31 13F QUEST DIAGNOSTICS COM 74834L100 293,415 -22,196 -7.03 15,709 -19.45 0.0140
2013-11-14 2013-09-30 13F QUEST DIAGNOSTICS COM 74834L100 315,611 14,124 4.68 19,502 6.69 0.0193
2013-08-13 2013-06-30 13F QUEST DIAGNOSTICS COM 74834L100 301,487 301,487 18,279 0.0194
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.